Base portion of a conveyor belt scraper blade



FIG. 1 is a front, top and left perspective view of a base portion of a conveyor belt scraper blade showing our new design; and,

FIG. 2 is a left side elevation view, with the right side elevation view being a mirror image thereof.

The broken line showing of a scraper blade is included for the purpose of illustrating environment and forms no part of the claimed design. 

CLAIM The ornamental design for a base portion of a conveyor belt scraper blade. 